You wake up in 1521 and a servant for King Henry VIII tells you that the king demands you explain what this "bitcoin" thing is that they read in your time traveler's journal or else you will lose your head.
In one tweet or less, explain what bitcoin is to someone from that era.
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It is a rigged scale whereupon a pound of sugar may, depending on one’s fortune and the whim of the Devil, be worth a thousand golden crowns or a small silver pfennig
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